/* body主体页面占比 */
.mybody_ {
    background-color: #F5F7F9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200vh;
    overflow-y: auto; /* 启用垂直滚动条 */
  }
  
  .mycentered {
    background-color: white;
    width: 39vw;
    height: 200vh;
  }

  .myheader_{
    color: lightskyblue; 
    font-size: 20px; 
    text-align: center; 
    padding: 30px 0; 
    display: flex; 
    justify-content: center;
    color: black;
  }

  ._back{
    margin-right: 16vw;
  }

  .mine_{
    margin-right: 18vw;
    margin-top: 20px;
    white-space: nowrap;
  }

  
 